The FERS annuity supplement

The FERS Annuity Supplement — officially called the FERS Special Retirement Supplement (or sometimes the "FERS bridge payment") — is an additional monthly payment made to certain FERS retirees who retire before age 62. Its purpose is to approximate the Social Security benefit you'd receive at 62, bridging the gap between your retirement date and when you become eligible for actual Social Security.

It's paid automatically by OPM as part of your monthly FERS annuity. You don't need to apply for it separately. It appears as a line item on your annuity statement, broken out from your basic pension amount.

The supplement is not a bonus on top of Social Security. It's an advance estimate of what your Social Security benefit will be, prorated by your years of FERS service. When you turn 62, the supplement stops — and you claim your actual Social Security benefit, which may be higher or lower than the supplement amount.

For employees who retire under MRA+30 (typically at age 56–57), the supplement can provide $15,000–$20,000 per year for up to 5–6 years before Social Security kicks in. That's $75,000–$120,000 in total bridge income that many federal employees don't even know they're entitled to.

The supplement is available only to FERS employees who retire under an immediate, unreduced annuity before reaching age 62. Here's a complete eligibility breakdown:

The key distinction is immediate vs. deferred and unreduced vs. reduced. MRA+10 retirees have an immediate annuity but it's reduced — they don't qualify. Deferred annuitants have an annuity but it's not immediate — they don't qualify either.

This is another reason why the MRA+30 retirement category is so valuable: it's the earliest point where you can retire with a full pension, FEHB, and the annuity supplement. For an employee born after 1969 (MRA = 57), that means retiring at 57 with three income streams instead of one.

The supplement formula is straightforward:

Annual Supplement = Estimated Social Security at age 62 × (FERS years of service ÷ 40)

The "Estimated Social Security at age 62" is calculated by the Social Security Administration based on your actual earnings record — OPM requests this from SSA when processing your retirement. It's not a number you calculate yourself, but you can estimate it from your SSA.gov account.

Worked example: Suppose your projected Social Security benefit at age 62 is $24,000/year and you have 30 years of FERS service:

$24,000 × (30 ÷ 40) = $24,000 × 0.75 = $18,000/year ($1,500/month)

If you had 20 years of FERS service instead:

$24,000 × (20 ÷ 40) = $24,000 × 0.50 = $12,000/year ($1,000/month)

The 40 in the denominator represents a "full career" of Social Security coverage. The formula essentially pays you a prorated share of your projected Social Security based on how many of those 40 years you spent as a FERS employee. If you had non-federal employment where you paid into Social Security, those years don't increase the supplement — but they do increase your actual Social Security benefit when you claim it at 62+.

Important: The supplement is based on your estimated Social Security at 62, not at your Full Retirement Age (67 for most current employees). Since Social Security claimed at 62 is reduced (~70% of FRA benefit), the supplement is also lower than what you'd receive if you claimed Social Security at FRA.

The FERS Annuity Supplement is subject to the same earnings test that applies to Social Security benefits claimed before Full Retirement Age. If you have earnings from work (wages or self-employment income) after retiring, OPM will reduce your supplement by $1 for every $2 you earn above the annual exempt amount.

The exempt amount for 2025 is $22,320. This threshold is adjusted annually for inflation.

At roughly $58,000 in post-retirement earnings, a supplement of $18,000/year would be completely eliminated. This is a critical consideration for FERS retirees who plan to work in the private sector after leaving government.

What counts as earnings: Only wages from employment and net self-employment income count toward the earnings test. Investment income, pension income, TSP withdrawals, and annuity payments do not count. If your post-retirement work is purely consulting on a 1099 basis, your net profit after business expenses is what's tested.

Reporting: OPM sends an annual earnings survey to supplement recipients. You must report your expected earnings each year. If you underestimate and receive an overpayment, OPM will recoup it from future annuity payments.

The FERS Annuity Supplement stops the month you turn 62. It is not extended, not converted, and not replaced by anything automatically. On your 62nd birthday month, the supplement line item disappears from your OPM annuity payment.

This is by design: at 62, you become eligible to claim actual Social Security benefits. The supplement was always meant to be a bridge to that point. But there's an important gap to understand:

• The supplement ends at 62 regardless of whether you claim Social Security at 62.
• If you choose to delay Social Security until 67 (FRA) or 70, you will have zero supplement and zero Social Security for the years between 62 and whenever you claim.
• This gap — no supplement, no Social Security — can be 5–8 years of reduced income if you delay claiming.

This is a critical planning point. If you retire at MRA (57) with the supplement, you receive it for 5 years. At 62, it stops. If you then delay Social Security until 67 to get a higher benefit, you need to cover 5 years of living expenses from your pension and TSP alone — without the supplement or Social Security. This is where the "bridge" metaphor breaks down: the supplement bridges you to 62, but there may be another bridge needed from 62 to whenever you claim Social Security.

The supplement is also completely separate from your actual Social Security benefit. When you claim Social Security at 62, 67, or 70, the amount you receive is determined by SSA based on your full earnings record — not reduced or offset by the supplement you received. The supplement was an estimate; your actual Social Security is the real calculation.

The FERS Annuity Supplement is taxable as ordinary income — the same as your FERS pension. It is not treated as Social Security income for tax purposes, even though it's designed to approximate Social Security.

This means:

• Federal income tax: The supplement is subject to federal income tax at your marginal rate. OPM withholds federal tax from it as part of your total annuity payment.
• State income tax: Most states tax the supplement as ordinary income as well. Some states exempt federal pension income, but the supplement may or may not fall under those exemptions — check your state's rules.
• Social Security taxation: Unlike actual Social Security benefits (which may be partially tax-free depending on your combined income), the supplement has no tax-free portion. 100% of it is taxable.
• FICA/Medicare: The supplement is not subject to FICA or Medicare withholding — you're already retired, so there's no payroll tax on it.

The practical impact: a $18,000/year supplement in the 22% federal bracket costs you ~$3,960 in federal tax, leaving ~$14,040 after tax. If you're in a state with a 5% income tax, that's another ~$900, for a net of ~$13,140. This is still meaningful income, but the tax bite is larger than what you'd pay on the same amount of actual Social Security (which may be 0% or 50% taxable depending on your income).

HighThree's estimator currently excludes the FERS Annuity Supplement from its projections. This is an intentional choice, not an oversight — and it means the estimates you see are conservative. Your actual pre-62 retirement income will be higher than what the tool shows if you qualify for the supplement.

Why exclude it? Three reasons:

1. Eligibility uncertainty: The supplement is only available for immediate, unreduced retirees. Many users exploring the estimator are considering early departure (MRA+10, deferred annuity) where the supplement doesn't apply. Including it by default would overstate income for those scenarios.
2. Earnings test complexity: The supplement is reduced or eliminated if you work in retirement. Since we can't predict your post-retirement earnings, showing the full supplement amount could be misleading.
3. Conservative by design: It's better to underestimate your retirement income and be pleasantly surprised than to overestimate it and make career decisions based on inflated projections.

If you're retiring under MRA+30 or age 60+20, add roughly $12,000–$20,000/year to the estimator's pre-62 income projections as a mental adjustment. The exact amount depends on your Social Security estimate and years of service — use the formula in the section above.

For the full technical details on what the estimator does and doesn't include, see the Methodology.

The FERS Annuity Supplement has several important implications for retirement planning:

1. MRA+30 is more valuable than it looks. If you're eligible for MRA+30 retirement, the supplement adds $15,000–$20,000/year of pre-62 income. This effectively increases your total retirement income by 25–35% during the bridge years. When comparing "stay until 62" vs. "leave at MRA," the supplement narrows the gap significantly.

2. The 62 cliff matters. If you've been relying on the supplement as part of your monthly budget, its sudden disappearance at 62 creates an income gap. You need a plan for that gap — either claim Social Security at 62 (reduced benefit), draw more from TSP, or have other income sources ready.

3. Post-retirement work has a hidden cost. If you're considering a "phased retirement" where you work part-time in the private sector, the earnings test can reduce or eliminate your supplement. A $40,000/year consulting gig could cost you $8,000+ in lost supplement — making the net income from that work much lower than the gross suggests.

4. Sequence-of-returns risk. For MRA+30 retirees, the supplement provides a guaranteed income floor during the first 5 years of retirement — exactly the period when sequence-of-returns risk is highest. Having $15K–$20K/year of guaranteed income means you may not need to withdraw as much from TSP in a down market, which can significantly improve your portfolio's long-term survival rate.

5. Delaying Social Security is more feasible with the supplement. If you retire at 57 with MRA+30, the supplement gives you 5 years of bridge income. If you then use TSP withdrawals to cover ages 62–67, you can claim Social Security at FRA for a 30%+ higher benefit than claiming at 62. The supplement makes this strategy more affordable by reducing the total gap you need to self-fund.

The HighThree estimator gives you year-by-year projections of your FERS pension, TSP balance, and total retirement income for every possible departure year. While it doesn't include the supplement, you can easily add it as a mental adjustment:

• Get your Social Security estimate at 62 from SSA.gov
• Multiply by (your FERS years of service ÷ 40)
• Add that amount to the estimator's pre-62 income for any MRA+30 or 60+20 scenario

Related resources:

• FERS Pension Estimator — year-by-year projections
• FERS Retirement Guide — complete overview of how FERS works
• Methodology — what the calculator includes and excludes
• What Drives It — the 12 key factors in your retirement number